The Secretary of State in the North has been asked to help solve the mystery of noisy night-time air operations in the skies over Derry.
There have been dozens of reports of families being wakened from their sleep by aircraft noise over the past few weeks. Foyle MLA Pat Ramsey has now written to Owen Paterson demanding an explanation.
People from the Creggan, Crescent Link, Steelstown, Rosemount, Gobnascale and Galliagh have all complained of the noise.
Pat Ramsey says the noise is causing havoc with the sleeping patterns of local people....